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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Effect of forage/concentrate ratio and dietary coconut oil level on methane output and performance of finishing beef heifers  [2003]

Lovett, D.; Lovell, S.; Stack, L.; Callan, J.; et al.

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Intake, animal performance and methane (CH4) output was investigated using 36 finishing Charolais cross heifers (mean starting weight 462 kg, S.D.±16) fed ad libitum over an 11-week period. Six dietary treatments were investigated in a randomised block design experiment with a factorial arrangement of treatments. The six experimental diets consisted of three forage/concentrate (F/C) ratios (0.65:0.35, 0.40:0.60 and 0.10:0.90) supplemented with two levels of coconut oil (0 or 350 g/day). Rumen protozoa numbers were significantly (P<0.001) lower for diets containing coconut oil at the end of the trial. Reducing the F/C ratio resulted in significantly (P<0.001) increased rates of live weight gain (LWG) and carcass gain (CG), but coconut oil had no effect on animal performance. Methane output in litres per day was significantly modified (P<0.001) by both the F/C ratio and level of coconut oil. Maximal CH4 output was recorded on the 0.40:0.60 diet, with coconut oil reducing daily CH4 output regardless of the F/C ratio. Methane output per unit of animal product (per kg of LWG and carcass gain) was significantly reduced by lower F/C ratios and the dietary inclusion of coconut oil (P<0.001 and P≤0.003, respectively). No significant (P>0.05) interaction between the F/C ratio and coconut oil level was identified although coconut oil significantly reduced dry matter intake (DMI), CH4 l/day and LWG on the 0.65:0.35 F/C ratio diet.
From the journal
Livestock production science
ISSN : 0301-6226

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2016
Volume:
84
Issue:
2
Start Page:
135
End Page:
146
All titles:
"Effect of forage/concentrate ratio and dietary coconut oil level on methane output and performance of finishing beef heifers"@eng
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2016
Volume:
84
Issue:
2
Start Page:
135
End Page:
146
All titles:
"Effect of forage/concentrate ratio and dietary coconut oil level on methane output and performance of finishing beef heifers"@eng